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12 PONTIAC 287 thru 455 9-3512X9 92
550 spring diam) 2021033 MAKE OFFER PER 1
Intake Runner: 235cc
5 Minimum Roller 4500 - 8500 Oval Track / Drag Race
The rocker arms used in our tests were our own 1
DART CNC PRO 1 SB FORD 210/62CC 1.437 .620 LIFT HEADS FREE HARLAND SHARP ROCKERS 12 PONTIAC 287 thru 455CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. FREE LIFETIME WARRANTED 1. 6 7 16 HARLAND SHARP ROCKERS! Complete Dart Pro 1 Small Block Ford CNC ported cylinder heads part #13071122 Ford Pro 1 CNC Ported cylinder heads are based on dedicated castings which are fully CNC ported and have fully CNC ported chambers for consistency and maxim air flow Dart Ford Pro 1 cylinder heads are cast from the same virgin 355 T6 aircraft alloy that is used in Dart
